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CVE-2023-34251

Grav Server Side Template Injection vulnerability

HIGH
7.2
CVSS Score
Published: June 14, 2023 at 09:31 PM UTC
Updated: June 17, 2026 at 06:03 AM UTC
1 product affected across 1 vendorGrav

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Severity
HIGH7.2
Exploit prediction
EPSS 2%
SSVC
PoC

Description

Grav is a flat-file content management system. Versions prior to 1.7.42 are vulnerable to server side template injection. Remote code execution is possible by embedding malicious PHP code on the administrator screen by a user with page editing privileges. Version 1.7.42 contains a fix for this issue.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Grav· Getgravcomposer
95%
v < 1.7.42
Affected range stops below 1.7.42, so it looks safe — our inference, not a vendor statement

References (3)

x_refsource_MISCVendor Advisory
Source: [email protected]
https://github.com/getgrav/grav/blob/develop/system/src/Grav/Common/Twig/Extension/GravExtension.php#L174
x_refsource_MISCPatch
Source: [email protected]
https://github.com/getgrav/grav/commit/9d01140a63c77075ef09b26ef57cf186138151a5
x_refsource_CONFIRMExploitVendor Advisory
Source: [email protected]
https://github.com/getgrav/grav/security/advisories/GHSA-f9jf-4cp4-4fq5

SSVC — Action Prioritization

SSVCPoCNot automatableTotal impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

7.2HIGH[email protected]
Attack Vector
NETWORK
Complexity
LOW
Privileges
HIGH
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-94

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